package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;


@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐
     * @param setmealDTO
     */
    @Transactional
    public void save(SetmealDTO setmealDTO) {

        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);

        setmealMapper.insert(setmeal);

        Long id = setmeal.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if (setmealDishes != null && setmealDishes.size() > 0){
            setmealDishes.forEach(setmealDish -> {
                setmealDish.setSetmealId(id);
            });
            setmealDishMapper.insertBatch(setmealDishes);
        }


    }

    /**
     * 分页查询套餐
     * @param setmealPageQueryDTO
     * @return
     */
    public PageResult page(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());

        Page<SetmealVO> page=setmealMapper.page(setmealPageQueryDTO);

        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Transactional
    public void deleteByIds(List<Long> ids) {
        //先判断能否删除---是否启用
        for (Long id : ids) {
            Setmeal setmeal=setmealMapper.seleteById(id);
            if (setmeal.getStatus() == StatusConstant.ENABLE){
                //起售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }

        //删除套餐表中的数据
        for (Long id : ids) {
            setmealMapper.deleteById(id);

            //删除套餐与菜品关联表中的数据
            setmealDishMapper.deleteBySetmealId(id);
        }

    }

    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    public SetmealVO getById(Long id) {
        Setmeal setmeal = setmealMapper.seleteById(id);

        SetmealVO setmealVO=new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);

        List<SetmealDish> setmealDishes=setmealDishMapper.getBySetmealId(id);
        setmealVO.setSetmealDishes(setmealDishes);

        return setmealVO;
    }

    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        //修改套餐的数据
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.update(setmeal);
        //删除关联菜单表的数据

        setmealDishMapper.deleteBySetmealId(setmealDTO.getId());
        //插入关联菜单表的数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealDTO.getId());
        });
        setmealDishMapper.insertBatch(setmealDishes);

    }

    /**
     * 套餐起售、停售
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        if (status == StatusConstant.ENABLE) {
            //启用,判断关联菜品是否包含未启用的菜品
            List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);
            setmealDishes.forEach(setmealDish -> {
                Long dishId = setmealDish.getDishId();
                Dish dish = dishMapper.getById(dishId);
                if (dish.getStatus() == StatusConstant.DISABLE) {
                    //关联菜品包含未启用的菜品
                    throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                }
            });
        }
            //全部启用，则启用套餐
            //禁用
            Setmeal setmeal = Setmeal.builder()
                    .id(id)
                    .status(status)
                    .build();

        setmealMapper.update(setmeal);



    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
